diff --git a/src/win_defs.h b/src/win_defs.h
index bc43fc3..2a18e4b 100644
--- a/src/win_defs.h
+++ b/src/win_defs.h
@@ -91,4 +91,4 @@ enum win_flags {
 static const int_fast16_t WIN_FLAGS_IMAGES_STALE =
     WIN_FLAGS_PIXMAP_STALE | WIN_FLAGS_SHADOW_STALE;
 
-static const int_fast16_t WIN_FLAGS_IMAGES_NONE = WIN_FLAGS_PIXMAP_NONE | WIN_FLAGS_SHADOW_NONE;
+#define WIN_FLAGS_IMAGES_NONE (WIN_FLAGS_PIXMAP_NONE | WIN_FLAGS_SHADOW_NONE)